Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / XmlUtils / System / Xml / Xsl / Runtime / SetIterators.cs / 1 / SetIterators.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System; using System.Xml; using System.Xml.XPath; using System.Xml.Schema; using System.Diagnostics; using System.Collections; using System.ComponentModel; namespace System.Xml.Xsl.Runtime { ////// Set iterators (Union, Intersection, Difference) that use containment to control two nested iterators return /// one of the following values from MoveNext(). /// [EditorBrowsable(EditorBrowsableState.Never)] public enum SetIteratorResult { NoMoreNodes, // Iteration is complete; there are no more nodes InitRightIterator, // Initialize right nested iterator NeedLeftNode, // The next node needs to be fetched from the left nested iterator NeedRightNode, // The next node needs to be fetched from the right nested iterator HaveCurrentNode, // This iterator's Current property is set to the next node in the iteration }; ////// This iterator manages two sets of nodes that are already in document order with no duplicates. /// Using a merge sort, this operator returns the union of these sets in document order with no duplicates. /// [EditorBrowsable(EditorBrowsableState.Never)] public struct UnionIterator { private XmlQueryRuntime runtime; private XPathNavigator navCurr, navOther; private IteratorState state; private enum IteratorState { InitLeft = 0, NeedLeft, NeedRight, LeftIsCurrent, RightIsCurrent, }; ////// Create SetIterator. /// public void Create(XmlQueryRuntime runtime) { this.runtime = runtime; this.state = IteratorState.InitLeft; } ////// Position this iterator to the next node in the union. /// public SetIteratorResult MoveNext(XPathNavigator nestedNavigator) { switch (this.state) { case IteratorState.InitLeft: // Fetched node from left iterator, now get initial node from right iterator this.navOther = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.InitRightIterator; case IteratorState.NeedLeft: this.navCurr = nestedNavigator; this.state = IteratorState.LeftIsCurrent; break; case IteratorState.NeedRight: this.navCurr = nestedNavigator; this.state = IteratorState.RightIsCurrent; break; case IteratorState.LeftIsCurrent: // Just returned left node as current, so get new left this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; case IteratorState.RightIsCurrent: // Just returned right node as current, so get new right this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } // Merge left and right nodes if (this.navCurr == null) { // If both navCurr and navOther are null, then iteration is complete if (this.navOther == null) return SetIteratorResult.NoMoreNodes; Swap(); } else if (this.navOther != null) { int order = this.runtime.ComparePosition(this.navOther, this.navCurr); // If navCurr is positioned to same node as navOther, if (order == 0) { // Skip navCurr, since it is a duplicate if (this.state == IteratorState.LeftIsCurrent) { this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; } this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } // If navOther is before navCurr in document order, then swap navCurr with navOther if (order < 0) Swap(); } // Return navCurr return SetIteratorResult.HaveCurrentNode; } ////// Return the current result navigator. This is only defined after MoveNext() has returned -1. /// public XPathNavigator Current { get { return this.navCurr; } } ////// Swap navCurr with navOther and invert state to reflect the change. /// private void Swap() { XPathNavigator navTemp = this.navCurr; this.navCurr = this.navOther; this.navOther = navTemp; if (this.state == IteratorState.LeftIsCurrent) this.state = IteratorState.RightIsCurrent; else this.state = IteratorState.LeftIsCurrent; } } ////// This iterator manages two sets of nodes that are already in document order with no duplicates. /// This iterator returns the intersection of these sets in document order with no duplicates. /// [EditorBrowsable(EditorBrowsableState.Never)] public struct IntersectIterator { private XmlQueryRuntime runtime; private XPathNavigator navLeft, navRight; private IteratorState state; private enum IteratorState { InitLeft = 0, NeedLeft, NeedRight, NeedLeftAndRight, HaveCurrent, }; ////// Create IntersectIterator. /// public void Create(XmlQueryRuntime runtime) { this.runtime = runtime; this.state = IteratorState.InitLeft; } ////// Position this iterator to the next node in the union. /// public SetIteratorResult MoveNext(XPathNavigator nestedNavigator) { int order; switch (this.state) { case IteratorState.InitLeft: // Fetched node from left iterator, now get initial node from right iterator this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.InitRightIterator; case IteratorState.NeedLeft: this.navLeft = nestedNavigator; break; case IteratorState.NeedRight: this.navRight = nestedNavigator; break; case IteratorState.NeedLeftAndRight: // After fetching left node, still need right node this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; case IteratorState.HaveCurrent: // Just returned left node as current, so fetch new left and right nodes Debug.Assert(nestedNavigator == null, "null is passed to MoveNext after IteratorState.HaveCurrent has been returned."); this.state = IteratorState.NeedLeftAndRight; return SetIteratorResult.NeedLeftNode; } if (this.navLeft == null || this.navRight == null) { // No more nodes from either left or right iterator (or both), so iteration is complete return SetIteratorResult.NoMoreNodes; } // Intersect left and right sets order = this.runtime.ComparePosition(this.navLeft, this.navRight); if (order < 0) { // If navLeft is positioned to a node that is before navRight, skip left node this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; } else if (order > 0) { // If navLeft is positioned to a node that is after navRight, so skip right node this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } // Otherwise, navLeft is positioned to the same node as navRight, so found one item in the intersection this.state = IteratorState.HaveCurrent; return SetIteratorResult.HaveCurrentNode; } ////// Return the current result navigator. This is only defined after MoveNext() has returned -1. /// public XPathNavigator Current { get { return this.navLeft; } } } ////// This iterator manages two sets of nodes that are already in document order with no duplicates. /// This iterator returns the difference of these sets (Left - Right) in document order with no duplicates. /// [EditorBrowsable(EditorBrowsableState.Never)] public struct DifferenceIterator { private XmlQueryRuntime runtime; private XPathNavigator navLeft, navRight; private IteratorState state; private enum IteratorState { InitLeft = 0, NeedLeft, NeedRight, NeedLeftAndRight, HaveCurrent, }; ////// Create DifferenceIterator. /// public void Create(XmlQueryRuntime runtime) { this.runtime = runtime; this.state = IteratorState.InitLeft; } ////// Position this iterator to the next node in the union. /// public SetIteratorResult MoveNext(XPathNavigator nestedNavigator) { switch (this.state) { case IteratorState.InitLeft: // Fetched node from left iterator, now get initial node from right iterator this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.InitRightIterator; case IteratorState.NeedLeft: this.navLeft = nestedNavigator; break; case IteratorState.NeedRight: this.navRight = nestedNavigator; break; case IteratorState.NeedLeftAndRight: // After fetching left node, still need right node this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; case IteratorState.HaveCurrent: // Just returned left node as current, so fetch new left node Debug.Assert(nestedNavigator == null, "null is passed to MoveNext after IteratorState.HaveCurrent has been returned."); this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; } if (this.navLeft == null) { // If navLeft is null, then difference operation is complete return SetIteratorResult.NoMoreNodes; } else if (this.navRight != null) { int order = this.runtime.ComparePosition(this.navLeft, this.navRight); // If navLeft is positioned to same node as navRight, if (order == 0) { // Skip navLeft and navRight this.state = IteratorState.NeedLeftAndRight; return SetIteratorResult.NeedLeftNode; } // If navLeft is after navRight in document order, then skip navRight if (order > 0) { this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } } // Return navLeft this.state = IteratorState.HaveCurrent; return SetIteratorResult.HaveCurrentNode; } ////// Return the current result navigator. This is only defined after MoveNext() has returned -1. /// public XPathNavigator Current { get { return this.navLeft; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System; using System.Xml; using System.Xml.XPath; using System.Xml.Schema; using System.Diagnostics; using System.Collections; using System.ComponentModel; namespace System.Xml.Xsl.Runtime { ////// Set iterators (Union, Intersection, Difference) that use containment to control two nested iterators return /// one of the following values from MoveNext(). /// [EditorBrowsable(EditorBrowsableState.Never)] public enum SetIteratorResult { NoMoreNodes, // Iteration is complete; there are no more nodes InitRightIterator, // Initialize right nested iterator NeedLeftNode, // The next node needs to be fetched from the left nested iterator NeedRightNode, // The next node needs to be fetched from the right nested iterator HaveCurrentNode, // This iterator's Current property is set to the next node in the iteration }; ////// This iterator manages two sets of nodes that are already in document order with no duplicates. /// Using a merge sort, this operator returns the union of these sets in document order with no duplicates. /// [EditorBrowsable(EditorBrowsableState.Never)] public struct UnionIterator { private XmlQueryRuntime runtime; private XPathNavigator navCurr, navOther; private IteratorState state; private enum IteratorState { InitLeft = 0, NeedLeft, NeedRight, LeftIsCurrent, RightIsCurrent, }; ////// Create SetIterator. /// public void Create(XmlQueryRuntime runtime) { this.runtime = runtime; this.state = IteratorState.InitLeft; } ////// Position this iterator to the next node in the union. /// public SetIteratorResult MoveNext(XPathNavigator nestedNavigator) { switch (this.state) { case IteratorState.InitLeft: // Fetched node from left iterator, now get initial node from right iterator this.navOther = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.InitRightIterator; case IteratorState.NeedLeft: this.navCurr = nestedNavigator; this.state = IteratorState.LeftIsCurrent; break; case IteratorState.NeedRight: this.navCurr = nestedNavigator; this.state = IteratorState.RightIsCurrent; break; case IteratorState.LeftIsCurrent: // Just returned left node as current, so get new left this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; case IteratorState.RightIsCurrent: // Just returned right node as current, so get new right this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } // Merge left and right nodes if (this.navCurr == null) { // If both navCurr and navOther are null, then iteration is complete if (this.navOther == null) return SetIteratorResult.NoMoreNodes; Swap(); } else if (this.navOther != null) { int order = this.runtime.ComparePosition(this.navOther, this.navCurr); // If navCurr is positioned to same node as navOther, if (order == 0) { // Skip navCurr, since it is a duplicate if (this.state == IteratorState.LeftIsCurrent) { this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; } this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } // If navOther is before navCurr in document order, then swap navCurr with navOther if (order < 0) Swap(); } // Return navCurr return SetIteratorResult.HaveCurrentNode; } ////// Return the current result navigator. This is only defined after MoveNext() has returned -1. /// public XPathNavigator Current { get { return this.navCurr; } } ////// Swap navCurr with navOther and invert state to reflect the change. /// private void Swap() { XPathNavigator navTemp = this.navCurr; this.navCurr = this.navOther; this.navOther = navTemp; if (this.state == IteratorState.LeftIsCurrent) this.state = IteratorState.RightIsCurrent; else this.state = IteratorState.LeftIsCurrent; } } ////// This iterator manages two sets of nodes that are already in document order with no duplicates. /// This iterator returns the intersection of these sets in document order with no duplicates. /// [EditorBrowsable(EditorBrowsableState.Never)] public struct IntersectIterator { private XmlQueryRuntime runtime; private XPathNavigator navLeft, navRight; private IteratorState state; private enum IteratorState { InitLeft = 0, NeedLeft, NeedRight, NeedLeftAndRight, HaveCurrent, }; ////// Create IntersectIterator. /// public void Create(XmlQueryRuntime runtime) { this.runtime = runtime; this.state = IteratorState.InitLeft; } ////// Position this iterator to the next node in the union. /// public SetIteratorResult MoveNext(XPathNavigator nestedNavigator) { int order; switch (this.state) { case IteratorState.InitLeft: // Fetched node from left iterator, now get initial node from right iterator this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.InitRightIterator; case IteratorState.NeedLeft: this.navLeft = nestedNavigator; break; case IteratorState.NeedRight: this.navRight = nestedNavigator; break; case IteratorState.NeedLeftAndRight: // After fetching left node, still need right node this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; case IteratorState.HaveCurrent: // Just returned left node as current, so fetch new left and right nodes Debug.Assert(nestedNavigator == null, "null is passed to MoveNext after IteratorState.HaveCurrent has been returned."); this.state = IteratorState.NeedLeftAndRight; return SetIteratorResult.NeedLeftNode; } if (this.navLeft == null || this.navRight == null) { // No more nodes from either left or right iterator (or both), so iteration is complete return SetIteratorResult.NoMoreNodes; } // Intersect left and right sets order = this.runtime.ComparePosition(this.navLeft, this.navRight); if (order < 0) { // If navLeft is positioned to a node that is before navRight, skip left node this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; } else if (order > 0) { // If navLeft is positioned to a node that is after navRight, so skip right node this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } // Otherwise, navLeft is positioned to the same node as navRight, so found one item in the intersection this.state = IteratorState.HaveCurrent; return SetIteratorResult.HaveCurrentNode; } ////// Return the current result navigator. This is only defined after MoveNext() has returned -1. /// public XPathNavigator Current { get { return this.navLeft; } } } ////// This iterator manages two sets of nodes that are already in document order with no duplicates. /// This iterator returns the difference of these sets (Left - Right) in document order with no duplicates. /// [EditorBrowsable(EditorBrowsableState.Never)] public struct DifferenceIterator { private XmlQueryRuntime runtime; private XPathNavigator navLeft, navRight; private IteratorState state; private enum IteratorState { InitLeft = 0, NeedLeft, NeedRight, NeedLeftAndRight, HaveCurrent, }; ////// Create DifferenceIterator. /// public void Create(XmlQueryRuntime runtime) { this.runtime = runtime; this.state = IteratorState.InitLeft; } ////// Position this iterator to the next node in the union. /// public SetIteratorResult MoveNext(XPathNavigator nestedNavigator) { switch (this.state) { case IteratorState.InitLeft: // Fetched node from left iterator, now get initial node from right iterator this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.InitRightIterator; case IteratorState.NeedLeft: this.navLeft = nestedNavigator; break; case IteratorState.NeedRight: this.navRight = nestedNavigator; break; case IteratorState.NeedLeftAndRight: // After fetching left node, still need right node this.navLeft = nestedNavigator; this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; case IteratorState.HaveCurrent: // Just returned left node as current, so fetch new left node Debug.Assert(nestedNavigator == null, "null is passed to MoveNext after IteratorState.HaveCurrent has been returned."); this.state = IteratorState.NeedLeft; return SetIteratorResult.NeedLeftNode; } if (this.navLeft == null) { // If navLeft is null, then difference operation is complete return SetIteratorResult.NoMoreNodes; } else if (this.navRight != null) { int order = this.runtime.ComparePosition(this.navLeft, this.navRight); // If navLeft is positioned to same node as navRight, if (order == 0) { // Skip navLeft and navRight this.state = IteratorState.NeedLeftAndRight; return SetIteratorResult.NeedLeftNode; } // If navLeft is after navRight in document order, then skip navRight if (order > 0) { this.state = IteratorState.NeedRight; return SetIteratorResult.NeedRightNode; } } // Return navLeft this.state = IteratorState.HaveCurrent; return SetIteratorResult.HaveCurrentNode; } ////// Return the current result navigator. This is only defined after MoveNext() has returned -1. /// public XPathNavigator Current { get { return this.navLeft; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- MissingManifestResourceException.cs
- ToolStripMenuItem.cs
- TextRange.cs
- FlowDocumentPage.cs
- MenuCommandsChangedEventArgs.cs
- ISCIIEncoding.cs
- EndPoint.cs
- StylusLogic.cs
- PageRequestManager.cs
- TaiwanLunisolarCalendar.cs
- EventRouteFactory.cs
- TextContainer.cs
- DummyDataSource.cs
- JapaneseLunisolarCalendar.cs
- XmlSchema.cs
- ListItemsPage.cs
- NativeMethods.cs
- LocationSectionRecord.cs
- SafeBitVector32.cs
- OleDbMetaDataFactory.cs
- PermissionAttributes.cs
- DynamicMethod.cs
- SQLResource.cs
- MessageBox.cs
- StatementContext.cs
- BuildResultCache.cs
- UserInitiatedNavigationPermission.cs
- TextReader.cs
- TextureBrush.cs
- Menu.cs
- XmlQueryRuntime.cs
- OrderedDictionaryStateHelper.cs
- FileDialog_Vista_Interop.cs
- Oci.cs
- ParameterModifier.cs
- LinkGrep.cs
- ToolStripGripRenderEventArgs.cs
- SplashScreen.cs
- ToolBarButtonClickEvent.cs
- HandleValueEditor.cs
- Lookup.cs
- XsdDuration.cs
- PeerOutputChannel.cs
- OrderByExpression.cs
- DefaultBinder.cs
- ProviderSettings.cs
- DataGridViewToolTip.cs
- IsolationInterop.cs
- XPathNavigatorReader.cs
- MouseWheelEventArgs.cs
- PropertySegmentSerializer.cs
- graph.cs
- SapiRecoInterop.cs
- Renderer.cs
- DbConnectionStringBuilder.cs
- ChangePassword.cs
- RectAnimationClockResource.cs
- MessageQueueKey.cs
- InfiniteTimeSpanConverter.cs
- RepeaterItem.cs
- UpdatePanel.cs
- CustomServiceCredentials.cs
- Rfc2898DeriveBytes.cs
- _ConnectStream.cs
- DetailsViewInsertedEventArgs.cs
- ObjectIDGenerator.cs
- WebPartActionVerb.cs
- ObjectDataSourceView.cs
- wmiprovider.cs
- DataGridViewCellValueEventArgs.cs
- CodeIdentifier.cs
- XmlDocumentType.cs
- RequestQueryParser.cs
- securestring.cs
- BindUriHelper.cs
- wgx_render.cs
- JsonStringDataContract.cs
- Visitors.cs
- SignalGate.cs
- CacheRequest.cs
- XmlTextEncoder.cs
- formatter.cs
- DateTimeOffsetConverter.cs
- ReceiveCompletedEventArgs.cs
- TreeViewItem.cs
- SqlVersion.cs
- SmiContextFactory.cs
- TraceHelpers.cs
- RemotingConfiguration.cs
- InheritanceUI.cs
- SizeConverter.cs
- DataGridCommandEventArgs.cs
- DataException.cs
- VersionedStreamOwner.cs
- BoundPropertyEntry.cs
- Bind.cs
- figurelength.cs
- Psha1DerivedKeyGenerator.cs
- DependencyObject.cs
- DataGridItemAutomationPeer.cs